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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace go
{
public class GenericStack : Group
{
public int widgetSpacing = 5;
public Orientation Orientation = Orientation.Horizontal;
public GenericStack()
: base()
{
borderWidth = 0;
sizeToContent = true;
}
int currentXForWidget = 0;
int currentYForWidget = 0;
public override void updateLayout()
{
//if (!(sizeIsValid && positionIsValid))
base.updateLayout();
currentXForWidget = clientBounds.X;
currentYForWidget = clientBounds.Y;
Rectangle contentBounds = Rectangle.Zero;
GraphicObject[] widgets = new GraphicObject[Children.Count];
Children.CopyTo(widgets);
foreach (GraphicObject w in widgets)
{
if (!enoughtSpaceForWidget(w))
advance(w);
if (enoughtSpaceForWidget(w))
{
w.renderBounds.X = currentXForWidget;
w.renderBounds.Y = currentYForWidget;
w.positionIsValid = true;
contentBounds += w.renderBounds;
advance(w);
}
else
break;
}
contentBounds.Width += borderWidth + margin;
contentBounds.Height += borderWidth + margin;
if (sizeToContent)
renderBounds.Size = contentBounds.Size;
else if (VerticalScrolling)
renderBounds.Size = new Size(renderBounds.Size.Width, contentBounds.Size.Height);
else if (HorizontalScrolling)
renderBounds.Size = new Size(contentBounds.Size.Width, renderBounds.Size.Height);
if (layoutIsValid)
registerForRedraw();
}
bool enoughtSpaceForWidget(GraphicObject w)
{
if (!sizeToContent)
{
int nextXForWidget = 0;
int nextYForWidget = 0;
if (Orientation == Orientation.Horizontal)
nextXForWidget = currentXForWidget + w.renderBounds.Width;
else
nextYForWidget = nextYForWidget + w.renderBounds.Height;
if (nextXForWidget > clientBounds.Right && !HorizontalScrolling)
return false;
if (currentYForWidget > clientBounds.Bottom && !VerticalScrolling)
return false;
}
return true;
}
void advance(GraphicObject w)
{
if (Orientation == Orientation.Horizontal)
currentXForWidget = currentXForWidget + widgetSpacing + w.renderBounds.Width;
else
currentYForWidget = currentYForWidget + widgetSpacing + w.renderBounds.Height;
}
}
}
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